Question

Sa se rezolve ecuatiile: |7x-1|=21-9x, |1-3x|=|3-2x|, |10+x|=-10-x, |5x-2|=3|x-1|, |x-1|+2|x-2|=3, ||x|-1|=13. REZOLVARE COMPLETA VA ROG.

Answer 1

7x+1 = 21-9x 
7x+9x = 21 - 1
16x=20
x=$20 \\ 16$ 
x= $5 \\ 4$


1+3x = 3+2x
3x-2x=3-1
x=2


10+x= -10-x
x+x= -10-10
2x= -20
x= $-20 \\ 2$
x= $-10 \\ 2$
x= 5


5x+2=3x+1
5x-3x= 1-2
2x=1
x= $1 \\ 2$


x+1+2x+2=3
x+2x=3-2-1
3x=0
x=3


x+1=13
x=13-1
x=12

Asta e raspunsul complet ;) Sper ca e bine :)